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C++, fix parsing of floating point literals

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Fixes sphinx-doc/sphinx#5636
This commit is contained in:
Jakob Lykke Andersen 2018-12-16 16:56:55 +01:00
parent c899b27b4a
commit b3de33deef
3 changed files with 27 additions and 3 deletions
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1
CHANGES
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@ -22,6 +22,7 @@ Bugs fixed
* #5627: qthelp: index.html missing in QtHelp
* #5659: linkcheck: crashes for a hyperlink containing multibyte character
* #5754: DOC: Fix some mistakes in :doc:`/latex`
* #5636: C++, fix parsing of floating point literals.
Testing
--------

13
sphinx/domains/cpp.py
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@ -294,7 +294,18 @@ _octal_literal_re = re.compile(r'0[0-7]*')
_hex_literal_re = re.compile(r'0[xX][0-7a-fA-F][0-7a-fA-F]*')
_binary_literal_re = re.compile(r'0[bB][01][01]*')
_integer_suffix_re = re.compile(r'')
_float_literal_re = re.compile(r'[+-]?[0-9]*\.[0-9]+')
_float_literal_re = re.compile(r'''(?x)
[+-]?(
# decimal
([0-9]+[eE][+-]?[0-9]+)
| ([0-9]*\.[0-9]+([eE][+-]?[0-9]+)?)
| ([0-9]+\.([eE][+-]?[0-9]+)?)
# hex
| (0[xX][0-9a-fA-F]+[pP][+-]?[0-9a-fA-F]+)
| (0[xX][0-9a-fA-F]*\.[0-9a-fA-F]+([pP][+-]?[0-9a-fA-F]+)?)
| (0[xX][0-9a-fA-F]+\.([pP][+-]?[0-9a-fA-F]+)?)
)
''')
_char_literal_re = re.compile(r'''(?x)
((?:u8)|u|U|L)?
'(

16
tests/test_domain_cpp.py
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@ -124,8 +124,20 @@ def test_expressions():
expr = i + l + u
exprCheck(expr, 'L' + expr + 'E')
for suffix in ['', 'f', 'F', 'l', 'L']:
expr = '5.0' + suffix
exprCheck(expr, 'L' + expr + 'E')
for e in [
'5e42', '5e+42', '5e-42',
'5.', '5.e42', '5.e+42', '5.e-42',
'.5', '.5e42', '.5e+42', '.5e-42',
'5.0', '5.0e42','5.0e+42', '5.0e-42']:
expr = e + suffix
exprCheck(expr, 'L' + expr + 'E')
for e in [
'ApF', 'Ap+F', 'Ap-F',
'A.', 'A.pF', 'A.p+F', 'A.p-F',
'.A', '.ApF', '.Ap+F', '.Ap-F',
'A.B', 'A.BpF','A.Bp+F', 'A.Bp-F']:
expr = "0x" + e + suffix
exprCheck(expr, 'L' + expr + 'E')
exprCheck('"abc\\"cba"', 'LA8_KcE') # string
exprCheck('this', 'fpT')
# character literals